玻璃钢动态力学性能的实验研究

利用分离式Ｈｏｐｋｉｎｓｏｎ压杆研究了国产环氧玻璃钢和聚脂玻璃钢在平均应变率为－１０＾３／ｓ下的动态力学性能，给出了这两种材料在冲击压缩下的弹性模量和能量吸收率，为新型飞行保护头盔的设计提供了材料的实验依据。     

Recycling of Reinforced Plastics

This work has shown is that it is possible to recycle continuous and short fibre reinforced thermosetting resins while keeping almost the whole of the original material, both fibres and matrix, within the recyclate. By splitting, crushing hot or cold, and hot forming, it is possible to create a recyclable material, which we designate a Remat, which can then be used to remanufacture other shapes, examples of plates and tubes being demonstrated. Not only can remanufacturing be done, but it has been shown that over 50 % of the original mechanical properties, such as the E modulus, tensile strength, and interlaminar shear strength, can be retained. Four different forms of composite were investigated, a random mat Glass Fibre Reinforced Plastic (GFRP) bathroom component and boat hull, woven glass and carbon fibre cloth impregnated with an epoxy resin, and unidirectional carbon fibre pre-preg. One of the main factors found to affect composite recyclability was the type of resin matrix used in the composite. Thermoset resins tested were shown to have a temperature range around the Glass Transition Temperature (T_g) where they exhibit ductile behaviour, hence aiding reforming of the material. The high-grade carbon fibre prepreg was found to be less easy to recycle than the woven of random fibre laminates. One method of remanufacturing was by heating the Remat to above its glass transition temperature, bending it to shape, and then cooling it. However, unless precautions are taken, the geometric form may revert. This does not happen with the crushed material.     

纤维增强塑料加工技术动向

本文分析了国内外纤维增强塑料的加工技术状况，根据不同增强塑料的加工技术和力学特性，提出了纤维增强塑料的开发方向。     

玻璃钢浮标材料的增强改性探讨

对浮标用的玻璃钢增强材料的改性进行了分析讨论,并对今后浮标用玻璃钢的发展进行了展望。     

纤维增强攻坚战斗部在混凝土中爆炸威力试验研究

为考核纤维增强攻坚战斗部在混凝土中的爆炸毁伤效应,对裸装药、复合材料壳体、钢壳体装药在混凝土靶中的爆炸破坏效应进行了对比试验研究。试验结果表明,同样装药情况下,裸装药爆炸产生的破坏区域大于复合壳体及钢壳体装药;复合材料壳体装药在阻抗匹配方面要比钢壳体装药好,更利于爆炸冲击波的传播;同样装药情况下,复合材料壳体装药爆炸对靶体爆炸驱动有效能量大于钢壳体装药。     

Determination of Optical Constants of Filled and Reinforced Plastics

It is shown that with the help of the dispersion analysis one can extract the IR spectra of both constituents of filled polymers from the IR spectrum of the latter. Comparison of synthetic spectra of constituents with original spectra of the same pure substances gives information about interactions between matrix and filler. The method is valid for analysing transmission, reflection, and ATR spectra.     

复材表面电弧离子镀镀铝膜性能研究

为了减小复材天线反射器在高频段的反射损耗,利用电弧离子镀膜技术在其表面镀Al膜。用万能拉伸测试仪、表面轮廓仪、SEM、XPS、XRD、Z-82数字式四探针测试仪对其性能进行评价。发现薄膜致密、均匀、形成晶体结构,导电性能接近块体Al材。通过XPS研究发现,组成薄膜的金属元素和基底中的氧、碳等元素发生了反应。在拉拔试验中,复材基底成分层状脱落,薄膜和复材基底附着完好。说明组成薄膜的Al元素在界面处和基底材料发生反应,形成化学键,提高了附着力。     

Numerical and Experimental Investigation of the Hydrostatic Performance of Fibre Reinforced Tubes

The increasing demands in subsea industry such as oil and gas, led to a rapidly growing need for the use of advanced, high performance, lightweight materials such as composite materials. E-glass fibre laminated pre-preg, filament wound and braided tubes were tested to destruction under hydrostatic external pressure in order to study their buckling and crushing behaviour. Different fibre architectures and wind angles were tested at a range of wall thicknesses highlighting the advantage that hoop reinforcement offers. The experimental results were compared with theoretical predictions obtained from classic laminate theory and finite element analysis (ABAQUS) based on the principal that the predominant failure mode was buckling. SEM analysis was further performed to investigate the resulting failure mechanisms, indicating that the failure mechanisms can be more complex with a variety of observed modes taking place such as fibre fracture, delamination and fibre-matrix interface failure.     

Experimental and Numerical Investigation on Impact Performance of Carbon Reinforced Aluminum Laminates

It is known that fiber metal laminates (FML) as one of hybrid materials with thin metal sheets and fiber/epoxy layers have the characteristics of the excellent damage tolerance, fatigue and impact properties with a relatively low density. Therefore, the mechanical components using FML can contribute the enhanced safety level of the sound construction toward the whole body. In this study, the impact performance of carbon reinforced aluminum laminates (CARAL) is investigated by experiments and numerical simulations. Drop weight tests are carried out with the weight of 4.7 kg at the speed of 1 and 2 m/s, respectively. Dynamic non-linear transient analyses are also accomplished using a finite element analysis software, ABAQUS. The experiment results and numerical results are compared with impact load-time histories. Also, energy-time histories are applied to investigate the impact performance of CARAL.     

Experimental Investigation of Bond Stress and Deformations in LWAC Ties Reinforced with GFRP Bars

The structures' durability is an engineering concern for a long time but has been increased in the last years. Lightweight aggregate concrete (LWAC) combined with glass fibre reinforced polymer bars allows to create structures with high performance in terms of durability. The glass fibre reinforced polymer (GFRP) bars have different ribs from those of steel bars, and consequently, its bond to concrete is affected. Moreover, the Young's modulus of GFRP is much below compared with that of steel, and this influences significantly the behaviour of structural elements reinforced with this material. This paper presents an experimental study focused on bond between LWAC and reinforcing bars of GFRP. Thirty‐six pull‐out tests were carried out using steel and GFRP bars. These reinforcements were combined with three types of concrete, all with the same design density 1900 kg m^?3 but with different values of compressive strength: 35, 55 and 70 MPa. Furthermore, 12 reinforced ties were tested, combining different types of bars (steel and GFRP), two different diameters (12 and 16 mm) and the three types of LWAC. Based on experimental results, several relations were established to understand the behaviour of LWAC structures reinforced with GFRP bars, mainly in the serviceability conditions. These results point out that ties deformation and crack width are very affected by the reduced Young's modulus of GFRP: deformations and crack width of ties reinforced with GFRP are significantly higher, approximately three times greater, compared with those of ties reinforced with steel. The tension stiffening effect was also analysed in detail, and it was found that it is slightly influenced by the concrete compressive strength but is highly dependent of the Young's modulus of the reinforcing material.     

碳纤维复合材料的微波反射特性研究

研究了各种铺层（０°、０°／９０°、±３０°、±４５°、±６０°）方式碳纤维复合材料（ＣＦＲＰ）的皮反射特性。结果表明,单向纤维铺层ＣＦＲＰ的反射率与纤维方向及层板厚度有关;交叉铺层ＣＦＲＰ的反射率很大,但比金属略小,喷涂了防雷击层的单向纤维铺层ＣＦＲＰ,电性能基本上各向员性;喷涂了防雷击层的０°、±４５°、０°／９０°ＣＦＲＰ的反射率比喷涂前有所降低。     

玄武岩纤维复合材料蠕变性能研究

树脂基基复合材料具有粘弹性,长期在外力作用下会发生蠕变现象,导致复合材料的刚度和强度都发生衰退,致使复合材料结构失去继续承载的能力。本文对连续玄武岩纤维(Continuous Basalt Fiber简称CBF)增强树脂基复合材料在不同应力水平下的长期力学行为进行研究,初步探讨了CBF复合材料的蠕变性能。     

玻纖復合材料制成矽灰石之研究

臺灣海洋大學材料工程研究所通去6年來至今,針對可燃與不可燃醫療廢弃物、石化産業有害廢弃物、模擬放射性廢弃物與可燃與各類不可燃廢弃物作一系列高温電漿熔融處理研究.此次研究處理對象爲不可燃廢弃物中的Fiber Reinforced Plastic(FRP)後合材料、刺鋼.研究配比中添加了玻璃以改變化學成份,經高温電漿熔融后熔岩具有高硬度、硬度平均值,低濾出率與非晶結構.添加特殊成分調節劑於熔岩粉末中均匀混合與特殊熱處理后,産生乳白色矽灰石玻璃陶瓷材料.     

玻纖復合材料制成矽灰石之研究

臺灣海洋大學材料工程研究所過去6年来至今,針對可燃與不可燃醫療廢弃物、石化産業有害廢弃物、模擬放射性廢弃物與可燃與各類不可燃廢弃物作一系列高温電漿熔融處理研究.此次研究處理對象爲不可燃廢弃物中的Fiber Reinforced Plastic(FRP)復合材料、刺綱.研究配比中添加了玻璃以改變化學成份,經高温電漿熔融后熔岩具有高硬度、硬度平均值,低濾出率與非晶結構.添加特殊成分調節劑於熔岩粉末中均匀混合與特殊熱處理后,産生乳白色矽灰石玻璃陶瓷材料.     

UHMWPE纤维增强聚氨酯泡沫对爆炸冲击波衰减性能的影响

运用实验的方法,研究了超高分子量聚乙烯纤维增强聚氨酯泡沫对爆炸冲击波的衰减性能;观察分析了爆炸荷载前后材料的微观结构形态,分析了材料对爆炸冲击波的衰减机理,对实验结果给出了合理的解释。研究表明,UHMWPE纤维高强、高模正好弥补了聚氨酯泡沫塑料的缺陷,以UHMWPE纤维作增强剂制备而成的增强聚氨酯泡沫塑料,能极大地提高材料对爆炸冲击波的衰减性能,在冲击波防护领域有很好的应用前景;同时,纤维长度对材料的衰减爆炸冲击波性能有较大的影响。     

复掺钢丝绒纤维/水镁石纤维沥青胶浆性能研究

通过改变纤维总掺量和两种纤维的体积比,采用廷度试验、锥入度试验、布氏旋转粘度试验和动态剪切流变试验研究了混杂纤维沥青胶浆的低温延展性能、抗剪切性能、粘度特性及高温流变特性,同时借助扫描电镜(SEM)对其试样断面进行观察分析.结果表明:沥青胶浆的低温延展性随纤维掺量的增大而降低;在6％纤维总掺量范围内,随着纤维掺量的增大粘度逐渐增大,且增大的幅度减小;当钢丝绒纤维与水镁石纤维体积比为6/4时,沥青胶浆的车辙因子(G*/sinδ)、抗剪强度达烈最佳值;将两种纤维混杂掺入沥青胶浆中,充分分散,其与沥青粘结良好,发挥了增粘和桥接作用,提高了沥青胶浆的整体稳定性和抵抗永久变形的能力.     

柴油机活塞环镀层摩擦学特性研究

活塞环缸套的磨损是决定发动机功能和耐久性的关键性因素.根据以往积累的经验和实现目标成本的考虑,最常用的柴油机用活塞环材料是灰铸铁和球墨铸铁,同时为了提高活塞环和缸套的寿命,在活塞环外圆面附加镀铬或喷钼等耐磨镀层.但是,随着柴油机功率的不断增加和排放要求的不断提高,对活塞环抗磨损的要求更高,人们又开发出性能更为优异的各种化学、物理沉积和复合镀等活塞环耐磨镀层,其中陶瓷复合镀铬技术已得到广泛的应用.本文论述了试验室磨损模拟试验方法对性价比最佳的镀铬、喷钼和陶瓷复合镀耐磨镀层的柴油机球墨铸铁活塞环进行摩擦学特性和磨损机理方面研究的结果.     

复掺钢丝绒纤维/水镁石纤维沥青胶浆性能研究

通过改变纤维总掺量和两种纤维的体积比,采用延度试验、锥入度试验、布氏旋转粘度试验和动态剪切流变试验研究了混杂纤维沥青胶浆的低温延展性能、抗剪切性能、粘度特性及高温流变特性,同时借助扫描电镜(SEM)对其试样断面进行观察分析。结果表明:沥青胶浆的低温延展性随纤维掺量的增大而降低;在6%纤维总掺量范围内,随着纤维掺量的增大粘度逐渐增大,且增大的幅度减小;当钢丝绒纤维与水镁石纤维体积比为6/4时,沥青胶浆的车辙因子(G*/sinδ)、抗剪强度达到最佳值;将两种纤维混杂掺入沥青胶浆中,充分分散,其与沥青粘结良好,发挥了增粘和桥接作用,提高了沥青胶浆的整体稳定性和抵抗永久变形的能力。